A fixed resistor is an electronic component that limits the flow of electric current in a circuit. Unlike variable resistors, which can change their resistance, fixed resistors have a set resistance value that does not change. They are commonly used in various electronic devices to control voltage and current levels, ensuring that components operate safely and effectively. Fixed resistors come in different types, such as carbon film, metal film, and wire-wound, each with unique properties and applications. They are essential in circuits for tasks like voltage division, signal conditioning, and biasing of transistors. Their reliability and simplicity make them a fundamental part of electronic design.